Adjustable cultivator-shovel



(No Model.)

M. A. TWITGHELL.

ADJUSTABLE OULTIVATOR SHOVEL.

Patented Jan. 13, 1885.

NITE STATES MYRON A. TWITOHELL, OF KINGSLEY, IOVA.

ADJUSTABLE CULTIVATOR-SHOVEL.

EaPECIFICATION forming part of Letters Patent No. 310,856, dated January13, 1885.

Application filed April 5, 1884. (No model.)

T to whom it may concern:

Be it known that I, MYRoN A. TWITOHELL, a citizen of the United States,residing at Kingsley, in the county of Plymouth and State of Iowa, haveinvented certain new and useful Improvements in Cultivator-Shovels, ofwhich the following is a description.

This invention relates to implements for cultivating the earth; and ithas for its object to provide a shovel or tooth for cultivators, whichshall be capable of doing service with any one ofits four sides or fourcorners forward, or with any side set at any desired angle ofinclination to the line of travel.

To this end my invention consists in the construction and combination ofparts forming a cultivator-shovel hereinafter described and claimed,reference being had to the accompanying drawings, in Which Figure l isan inverted plan view of my shovel. Fig. 2 is a longitudinal verticalsection of thesame, showing the shovel inverted; and Fig. 3 is atransverse section in detail.

J represents the blade of the shovel in the form of a trapezium whosemajor sides and transverse diameter, taken together, would form anequilateral triangle, and whose inner sides are each about twothirds thelength of a major side. This blade is a plate of steel concave in itsfront face, like a segment of a spherical shell. Thus each of its foursides, which are sharpened as plowing-edges, are concave.

F is a shank having a socket in which the' standard E is held by aset-screw, m. This shank F is rigidly fixed to a beveled serrated wheel,G, which is centrally pivoted to the blade J, upon a screw-bolt, N,whereby the plate may be turned completely around, so that any one ofits four edges may be set at any angle with the line of travel.

H and I are buttons, each having a concave serrated edge fitted toengage the edge of the wheel G at any point of its circumference. Eachof these buttons has a slot, L, through which and a hole in the plate .la screw-bolt, K, passes to hold the button to the plate. By means of theslot the button may be set to en gage or disengage the wheel. Thus theplate J may be firmly secured to the wheel G, by fixing the buttons andscrewing down the nuts on bolts K, in anyposition desired relative tothe handle. By means of the different angles of the blade this plow isadapted to do a great variety of work in both right and left handedplowing.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, with a trapeziumshaped plow-blade sharpened at itsfour edges, concave, and centrally perforated, of a cylindricalstandard, E, a shank, F, having a socket therefor, and a set-screw, m,and a bolt securing the shank reversibly to the center of the saidblade, substantially as described, whereby a plow-blade hung to presentany side or corner forward may be turned around the standard to anyangle with the line of travel, for the purpose set forth.

2. The combination, with the many-edged blade J, of the beveled serratedwheel G,pivoted thereon,the shank F,secured to the wheel G, and providedwith a standardsoeket, and the buttons H and I, having serrated edgesand slots L, and the bolts K, substantially as shown 7 and described.

MYRON A. TXVITOHELL.

WVitn'esses:

M. ROACH, D. W. WQOD.

